Deuteronomy 16:2-4

International Standard Version

² Then sacrifice sheep and cattle for the Passover to the Lord your God at the place where the Lord your God will choose to establish his name. ³ You must not eat any yeast with it. Instead, for seven days eat bread without yeast—the bread of affliction—because you left the land of Egypt in haste. Remember the day you went out of the land of Egypt for the rest of your lives. ⁴ Yeast is not to be seen in any of your territories for seven days. The meat is not to remain from the evening of the first day until morning.